The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 1985
Filed:
Nov. 14, 1983
Desmond H Reynolds, West Midlands, GB;
Phillip A Taft, West Midlands, GB;
Lucas Industries Public Limited Company, Birmingham, GB;
Abstract
In a high pressure hydraulic system a slave unit is supplied with fluid from a source through a control valve assembly. The assembly has a valve mechanism to control flow between ports communicating with the source and slave unit. The valve mechanism has two members, a first member controlling flow through the first port in response to a spring, a solenoid, and the pressure differential, the solenoid being unable to move the member against a significant pressure differential, and a second member controlling flow through the second port in dependence on the first member, the pressure differential and a spring. The first port has an elastomeric seal preventing leakage when the port is closed. The system has particular advantages when it is used as a vehicle suspension levelling system, in which an electronic control system controls the supply of fluid from an accumulator through a manifold and control valve assemblies to hydraulic suspension struts in accordance with ride height signals.